Use target: project to remove the dotnet restore warnings

Author: kevinchalet

samples/Mvc.Client/project.json

@@ -15,7 +15,7 @@
   },
 
   "dependencies": {
-    "AspNet.Security.OpenId.Steam": "1.0.0-alpha4-*",
+    "AspNet.Security.OpenId.Steam": { "target": "project" },
     "Microsoft.AspNetCore.Authentication.Cookies": "1.0.0-rc2-*",
     "Microsoft.AspNetCore.Hosting": "1.0.0-rc2-*",
     "Microsoft.AspNetCore.Mvc": "1.0.0-rc2-*",

src/AspNet.Security.OpenId.Steam/project.json

@@ -31,7 +31,7 @@
   },
 
   "dependencies": {
-    "AspNet.Security.OpenId": "1.0.0-alpha4-*",
+    "AspNet.Security.OpenId": { "target": "project" },
     "JetBrains.Annotations": { "type": "build", "version": "10.1.4" }
   },